Printing-press.



J. T. MILLER.

PRINTING PRESS.

APPLICATION FILED 0OT.11,1907.

Patented Jan. 26, 1909.

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J. T. MILLER.

PRINTING PRESS.

APPLICATION FILED OGT.11,1907. 91 0,704 Patented Jan. 25, 1909.

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PRINTING PRESS.

APPLIOATION FILED OOT.11,1907.

910,704. Patented Ja1'1.26, 1909.

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APPLICATION FILED 0UT.11,1907.

Patented Jan. 26, 1909.

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PRINTING PRESS.

APPLICATION 211.111) 00T.11,1907.

Patented Jan. 26, 1909.

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J. T. MILLER.

PRINTING PRESS.

APPLICATION FILED 001.11,1907.

Patented Jan. 26, 1909.

6 SHEETS-SHEET 6.

JOHN T. MILLER, OF KANSAS CITY, MISSOURI.

PRIN TIN G-PRESS.

Specification of Letters Patent.

Patented Jan. 26, 1909.

Application filed. October 11, 1907. Serial No. 397,008.

To all whom it may concern:

Be it known that I, JOHN T. MILLER, a citizen of the United States,residing at Kansas City, in the county of Jackson and State of Missouri,have invented certain new and useful Improvements in Printing-Presses,of which the following is a specification.

This invention relates to printing presses and my object is to producean eflicient and reliable machine which is entirely automatic in itsaction and of simple, strong, durable, compact and comparativelyinexpensive construction.

With this general object in view and others as hereinafter appear, theinvention consists in certain novel and peculiar features ofconstruction and organization as hereinafter described and claimed andin order that it may be fully understood reference is to be had to theaccompanying drawings, in which Figure 1, is a side elevation of aprinting press embodying my invention. Fig. 2, is a top plan view of thesame. Fig. 3, is a vertical longitudinal section taken on the lineIII-III of Fig. 2. Fig. 4, is a front view of the machine. Fig. 5, is aperspective view of a part of the front end of the machine. Fig. 6, isan enlarged vertical section taken on the line VIVI of Fig. 7. Fig. 7,is a horizontal section on the line VII-VII of Fig. 3. Fig. 8, is avertical section on line VIII-VIII of Fig. 9. Fig. 9, is a verticalsection on line IXIX of Fig. 8 and also shows a portion of the printingcylinder. Fig. 10, is a vertical section on line XX of Fig. 2. Fig. 11,is a front view of one of the upper corners of the press with the partsin the background omitted. Fig. 12, is a side view of a part of thereciprocatory bar forming part of the machine. Fig. 13, is a side viewof part of another reciprocatory bar forming part of the machine, andFig. 14, is a vertical section through the cylinder but looking towardthe end opposite to that shown in Fig. 10.

In the said drawings, 1 indicates a suitable frame of skeletonconstruction and embody ing at a suitable point a cross bar 2 ofinverted-U shape by preference provided with an opening 3.

4 are standards rising from the cross bar at opposite sides of theopening and forming intermediate supports for two pairs oflongitudinally extending bars 5, supported at their ends on cross bars 6of the frame and cast integral therewith by preference, as

shown, the rear cross bar connecting the up- 1 per ends of bearingstandards 7 forming parts of the frame.

8 indicates longitudinal series of antifriction rolls journaled in andbetween the pairs of bars 5 and forming supports for the reciprocatorybed 9, fitting snugly between the sides of the frame and channeled inits underside to receive said rolls, the bases of said channels formingtracks 10 to run directly upon the rolls.

Secured to and projecting rearwardly from the bed is an ink distributingplate 11, the upper surface of the type, not shown, upon the bedoccupying substantially the same horizontal plane as the correspondingface of said plate.

12 is a longitudinal rib at the underside of the bed pivotally connectedby link 13 to a rock bar 14 extending through opening 3 and journaled atits lower end on the transverse shaft 15 within the bar 2, said shaftbeing j ournaled near its ends in the sides of the frame and equippedoutwardly thereof with depending cranks 16, for a purpose whichhereinafter appears.

17 is a link pivotally connected at 18 to rock-bar 14 and to the wristpin 19 projecting from a large gear wheel 20 arranged between standards7 and secured rigidly upon the inner end of a transverse shaft 21journaled in bearings 22 secured to the rear end of the frame, see Fig.4.

23 is a cam secured rigidly on shaft 21 and consisting of a large and asmall portion arranged diametrically opposite to each other with theirtread surfaces concentric with respect to the shaft and the oppositeends of the large portion converging to meet the periphery of the smallportion, the cam being of such form that any diametric line intersectingconcentric peripheries of the large and small portions of the cam isuniform, that is to say is equal to the distance between the pair ofrollers 24 journaled on a longitudinally extending bar 25 of stepshapein side view, with its rear portion enlarged and provided with alongitudinal slot 26 through which shaft 21 extends. The front portionof said bar rests by preference, on cross bar 2 and is prevented fromturning during its reciprocatory action by the overlying roller 27 journaled on bracket 28 secured to the frame. The bar is bent to invertedU shape to provide the vertical elongated opening 29 to receive the pin30 of a crank arm 31 secured to shaft 15 and projecting up through aslot 32 in cross bar 2, a spring catch 33 secured to the frame beingadapted to engage pin 30 as hereinafter explained, for the purpose ofholding it in the position shown by dotted lines Fig. 6.

Pivoted at 34 to the frame is a foot lever 35 having its rear endupturned at a point between cross bar 2 and roller 27 and provided witha flanged guide roller 36 engaging bar 25 from below. At its front endthe foot lever is provided with a laterally projecting lug 37 engagingthe upwardly projecting arm of and holding repressed the spring catch 38secured to the frame.

39 is an eccentric secured on shaft 21 at one side of the frame andpivoted to said eccentric is a link 40 adjustabl pivoted at its upperend to the rearward y projecting crank arm 41 of a transverse shaft 42journaled in standards 43 rising from the rear end of the frame. Saidshaft is provided with an inking roller 44 and at one end with a ratchetwheel 45 engaged by a pivoted pawl 46 carried by crank arm 41, said pawlbeing adapted upon each downward movement of arm 41 to impart rotarymovement to the ratchet wheel and roller 44. The roller 44 inconjunction with the downwardly and forwardly sloping plate 47 and thestandards 43 form an ink font, plate 47 resting on plate 48 connectingthe standards and equipped with set screws 49 to adjust the spring plate47 and thus regulate the quantity of ink which roller 44 is permitted todistribute.

50 is a plate hinged at 51 to the standards and forming a cover for theink font and also a support for the forwardly projecting flange 53 atits upper end to effect the release of each sheet of paper, ashereinafter explained.

54 is an ink-distributing roller for engagement at times with roller 44and carried by and connecting the front ends of a pair of rock arms 55secured on a cross rod 56 journaled on the frame, one of said rock armsbeing adjustably pivoted at 57 to a reciprocatory bar 58 having alongitudinal slot 59 engaging shaft 21 and provided at opposite ends ofsaid slot with rollers 60 in peripheral engagement with the cam 23 atdiametrically opposite points so as to be reciprocated as said cam isrevolved and cause roller 54 to take ink from roller 44 and apply it tothe inking plate 11 from which it is transferred by other inkingrollers, not shown, because of common construction and arrangement, tothe type when the bed moves rearwardly as hereinafter referred to, itbeing understood that plate 11 is recharged with ink on the samereciprocatory movement.

Bearing standards at opposite sides of the press frame consist of a pairof brackets 61 connected by top bars 62 and slidingly vLu, uez:

mounted in said standards to operate vertically are bearing boxes 63having depending arms 64 pivotally connected at 65 to the upper ends ofa pair of link rods 66 pivoted at their lower ends on cranks 16 of shaft15 hereinbefore described, so that rocking movement of said shaft willimpart reciprocatory movement to said slidable bearing boxes and thusraise and lower shaft 67 and the slotted hollow cylinder 68 mountedthereon, one end of said cylinder forming a gear wheel 69 meshing with arack bar 70 secured in a longitudinal recess 71 in bed 9, the rack barbeing formed with an inwardly projecting flange 72 having an upwardlysloping or cam face 73 at its rear end, see Fig. 11, and the dotted linein Fig. 3.

74 indicates a feed table at the front end of the machine and pivoted at75 to standards 76 rising from the frame. At its front end the feedtable is provided with rollers 77 engaging ribs 72 and held when the bedis at the limit of its rearward movement, at the top of cam surfaces 73so as to cause the rearwardly projecting plate 78 carried by the tableto almost contact with the cylinder in a plane below its axis. Saidplate is set into the table 74 flush with the upper surface of thelatter and is provided with a slot 79 extending transversely of themachine, through which extend the vertical pins 80 carried at the outerends of a pair of bars 81 pivoted at their inner ends to a pair oflevers 82 and 83 pivoted to and underlying the table 74. A link 84pivotally connects levers 82 and 83 rearward and forward respectively oftheir pivotal points. Lever 82 is provided with a laterally projectingarm 85 terminating in a depending arm 86 adapted to be struck by the bedon its forward movement for the purpose of sliding pins 80 inward ortoward each other, said pins being held pressed yieldingly outward bymeans of a spring 86 secured to plate 74 and engaging lever 82. To limitthe outward movement of said pins, plate 74 is equipped with a slidablestop bar 87 for engagement with the rear edge of arm 85, a clampingscrew 88 being employed to secure the stop plate 87 at the desired pointof adjustment.

The operator will successively feed the sheets of paper to be printed byplacing them upon table 74 and sliding them forward until between pins80 without exercising any special care except to place the paper withinthe range of movement of the particular pin which is to engage it. Nowwhen the bed makes its rearward movement it strikes arm 86 and causesthe pins to move inward, so that the particular pin referred to shallengage and slide the paper toward the other pin until the paper attainsthe exact position which it shall occupy upon the table. As a result theprinting will occur at exactly the same point on each sheet.

89 is a rock shaft journaled in the ends of the cylinder parallel withshaft 67 and provided at one end with a crank 90 equipped with ananti-friction roller 91. Near its opposite end by preference, a spring92 is provided to hold the shaft yieldingly at one limit of its rockingmovement. Secured by screws 93 on the rock shaft is a pair of grippers(one only appearing), each consisting of a threaded rod 94.

95 is a U-shaped stop having its inner end fitting slidingly on the rodand its outer end forked as at 96, and seated astride the rod, a pair ofnuts 97 engaging the rod to secure the stop rigidly thereon, it beingnoticed by reference to Fig. 10, that the grippers stand at an angle tothe roller-equipped crank arm and that the spring 92 tends to cause thegrippers to press yieldingly against the cylin der where it forms oneside of the slot thereof.

98 is a pair of standards rising from the opposite sides of the frame atthe rear side of and contiguous to the cylinder and secured rigidly toand projecting rearwardly from the upper ends of said standards are aair of bars 99 connected near their rear encs bya brace bar 100 andforming journals at such ends for the transverse shaft 101 equipped witha series of convex-faced rollers 102, the ends of the shaft being alsojournaled in bearing standards 103 rising from the sides of the frame,and ournaled in the front ends of said bars 99 is a roller 104,connected by a series of longitudinally extending tapes 105 with therollers 102.

106 is an inclined table hinged at its rear end at 107 to the hingedcover 50 and resting at its front end on brackets 108, carried bybearing standards 103. A rock frame pivoted on the rod 109 journaled inthe frame at its rear end, comprises a pair of approximatelysemicircular arms 110 connected by a cross bar 111, the arms beingpivotally connected by link 112 with the rock lever 113 pivoted at 114to the frame and provided at its rear end with a roller 115 engaging theunderside of the eccentrically disposed disk 39, so that said disk oncein each revolution shall swing the rock frame rearwardly and permit itto gravitate back to its original position. The cross bar of the rockframe when in normal position stands above and slightly rearward of thetapes 105 and carried by said cross bar is a pair of brackets 116 inwhich a roller 117 is journaled, the spindle of said roller having acrank arm 118 to be turned by the arm 119 projecting from one of thestand ards 103, the turning of roller 117 causing the jaws 120 carriedby said roller to swing upward and clamp the printed sheet upon thetapes against the stationary aws 121 carried by the cross bar 111 of theswing frame, it be ing noticed by reference particularly to Fig. 5 thatsaid jaws are held with the paper clamped between them by the springdetents 122 and 123 carried by the roller 117 and cross bar 111respectively, the detents 122 being snapped into engagement with detent123 as said roller 117 is turned as explained.

124 are stops projecting upward from the front or free end of table 106,to arrest each sheet of paper as it travels forward on the tapes andhold it in position to be engaged by the jaws 120 and 121, and also toprevent the sheets of paper from sliding forwardly off the table 106after the sheets are deposited thereon, this deposit being effected bythe engagement of the crank 118 of the roller spindle coming in contactwith the inwardly projecting flange 53 of arm 52 hereinbefore described,the cross bar 111 passing over said flange and one of the arms 110passing at the outer side of said flange, the resistance of the flangeovercoming the yielding resistance offered by the detents so as toeffect the disengagement of the same, in which relation they remainuntil again reengaged by the reverse action of the roller through theinstrumentality of arm 119.

To drive the machine it is provided at its rear end with a shaft 125equipped with a belt wheel 126 and a pinion 127 meshing with wheel 20and to o erate the endless tapes 105 shaft 101 is equipped with a pulley128 connected by a cross belt 129 with a pulley 130 on shaft 125.

When the parts are in substantially the position shown in Figs. 1 and 3,a sheet of paper is upon the table 74 and is pressed against one wall ofthe slot of the cylinder by the grippers 94, the receding sheet ofpaperalready printer lying upon the tapes with its front end clampedbetween jaws 120 and 121.

Assuming that the machine is now started so as to operate wheel 20 inthe direction indicated by the arrow thereon (see Fig. 3) the bed 9 willbe moved rearward and through the agency of rack bar 70 will rotate thecylinder in the direction indicated by the adjacent arrow Fig. 3, so asto draw the paper clamped thereagainst from off the rear end of table'74, and over type carried by the bed, the cylinder in this actionpressing the paper down upon the type so that it shall receive animpression therefrom. This movement of said parts continues until thecylinder has made about three-fourths of a revolution or until the freeor tail end of the paper has been raised above the plane of the endlesstapes which are traveling in the direction indicated by the arrow Fig.3, it being understood that as the free or tail end of the paper attainsthe position mentioned, it is free to and does spring outward above thetapes this slight tendency to straighten out and centrifugal forceinduced by the movement of the cylinder obviously tending to throw saidtail end outward from the cylinder. As this movement of the cylinder andbed takes place the reciprocatory bar 25 remains stationary because itsrollers 24 are in engagement with the concentric portions of theperiphery of cam 23. During such movement the eccentric disk 39 byengagement with roller 115 operated a half revolution so as to operatebar 113 and cause the rock-frame equipped withjaws 120 and 121, to swingrearward until the crank arm of roller 117 came into engagement withflange 53 to effect the separation of said aws and the deposit of theprinted sheet of paper formerly resting on the tapes, upon table 106, itbeing also understoor that said eccentric disk through the connectionsdescribed incidentally caused inking roller 54 to engage and deposit inkupon the ink distributing plate 11.

As the actions described terminate, wheel 20 completes a half revolutionand therefore through the connection described, starts the table forwardand incidentally reverses the operation of the cylinder, the inkingroller and the rock frame for transferring the sheets from the tapesonto the table 106 and shoving the free or tail end of the paperforwardly upon the tapes. As said reverse operation begins the rearmostroller 24 of bar 25 moves rearward upon one and the companion rollerupon the other surface of the cam connecting the peripheries of theconcentric portions thereof, this action through the connections betweenthe slot 29 of bar 25 and the connecting pin 30 of crank arm 31 of rockshaft 15, rocking said shaft so as to swing its depending cranks 16forward. This slight forward and upward swing of the crank arms whilethe cylinder is making such reverse rotatable movement, raises thecylinder bodily through the medium of the links 66 and the sliding boxes63, it being also noticed in this connection by reference particularlyto Fig. 8, that the connections between one of the rods 66 and thecurved track 131 pivoted thereto and fulcrumed as at 132 on thecontiguous bearing standard 61, raises the free end of said curved trackfor a purpose which presently appears. The elevation of the cylindertaking place by preference just about as the said reverse rotation ofthe cylinder begins, and as a result roller 91 of the crank arm of therock shaft 89 comes into engagement with the overhanging track 133projecting inward from the bar 62 of the contiguous standards 61. Saidcrank arm 90 as a result of such engagement is reversed and the rockshaft consequently rocked to withdraw the grippers from engagement withthe sheet upon the cylinder and at that time moving toward the tapes,with its free end upon the latter it being understood that the saidpaper is resting for the greater part of its length upon the tapesbefore it is released by the grippers as explained, in order that thefrictional engagement of the tapes with the paper may positively andreliably efiect the rearward movement of the latter, this movementcontinuing until the paper is arrested by contact with the stops 124.The reverse movement of the cylinder continues and as about a halfrevolution is completed the cam 23 starts bar 25 forward toward itsoriginal position by the movement of the front roller of said bar towardthe periphery of the larger portion of the cam and correspondingmovement of the other roller toward the periphery of the small portionof the cam, this forward movement of the bar rocking the rock shaft 15back to its original position so as to swing the crank arms 16 downwardand rearward to their original positions and thus through theconnections between the crank arms and the cylinder lower the latter, itbeing understood, however, that before this lowering of the cylinder andhence of the curved track 131 occurs, roller 91 clears track 133 and thegrippers are pressed back against the wall of the slot of said cylinder,and are again swung away from said wall by the engagement of roller 91of crank arm 90 with curved track 131 and remain in such position untilthe gages 95 engage the projecting end of the sheet of paper upon table74 and push the same forward slightly when the downward movement of thecylinder and hence of the curved track 131 occurs to permit the grippersto press the end of said sheet of paper against the opposing wall of theslot of the cylinder, at which time the parts are in their originalpositions so that all future operations are repetitions of thosedescribed. During the reverse movement of the cylinder the printed sheetdeposited upon the tapes by such reverse movement is carried forwarduntil it engages and is arrested by stops 124 and as the reversemovement ends and the grippers dpick up the next sheet of paper asexplaine the grippers of the rock-frame at the rear end of the machineengage the printed sheet upon the tapes and swing rearwardly with thesame until the flange 53 of arm 52 moves the jaws apart and permits thepaper to fall down upon the table 106.

It will be understood by reference to Fig. 6 particularly, that when thecylinder is elevated the front end of bar 25 is rearward of roller 27which normally holds said bar down into operative relation with thecrank arm 31, and that the pin of the crank arm is in engagement withthe spring catch 33 which catch engages said pin each time the cylinderis elevated. If it be desired to maintain the cylinder in its elevatedposition, for instance when the machine is in operation but no paper isbeing fed into it and thereby prevent the cylinder from coming intocontact with the type and being defaced by ink therefrom, the operatorpresses with his foot upon the front end of lever 35 and swings the rod25 upward to substantially the position shown in dotted lines so thatthe reciprocation of the rod while raised will be above the plane of theroller 27 and therefore inoperative as regards rock shaft 15. It willalso be seen that the roller 27 acts as a positive lock against upwardmovement of the front end of reciprocatory bar 25 during the printingoperation of the cylinder, that is during the time when the cylinder isdepressed.

It will also be noticed by reference to Fig. 10, in which the cylinderis shown as making its reverse movement, as indicated by the arrow, thatthe track 183 is so formed as to permit the grippers to close againstthe wall of the cylinder so as to avoid conflict with the roller 104 oftapes 105, the grippers as hereinbefore explained being again openedwhen the roller comes into engagement with the curved track 131, itbeing necessary as the parts are proportioned and arranged that the gripers close in order that they may pass ro ler 104, it being understoodof course that the parts may be so proportioned as to avoid thenecessity of closing the grippers after they are once opened to releasethe printed sheet of paper until they are again ready to engage afollowing or unprinted sheet upon the table 74.

From the above description it will be apparent that I have produced aprinting press embodying the features of advantage enumerated and I wishit to be understood that I do not desire to be restricted to the exactdetails of construction shown and described as obvious modificationswill suggest them selves to one skilled in the art.

Having thus described the invention what I claim as new and desire tosecure by Letters- Patent, is

1. In a printing press, a suitable frame provided with vertical slots,boxes slidable therein, a shaft suitably j ournaled in the boxes andequipped with a hollow longitudinally slotted cylinder, a rock shaft forthe cylinder, equipped with grippers to clamp a sheet of paper againstone wall of the slot of the cylinder and with a crank arm, means to turnthe cylinder and then reverse its move ment, means to raise the boxesand the cylinder as the reverse movement of the latter occurs, a trackabove the said crank arm to be engaged by and operate the crank armduring the reverse movement of the cylinder to effect the release of thepaper by the grippers, and a pivoted track pivotally connected. to oneof the boxes and underlying the said crank arm and adapted while thecylinder is elevated to be engaged by and repress the crank arm and holdit repressed until the reverse movement of the cylinder is ended and thesecond sheet of paper is interposed between the said grippers and thesaid wall of the slot.

2. In a printing press, a suitable frame provided with vertical slots,boxes slidable therein, a shaft suitably journaled in the boxes andequipped with a hollow longitudinally slotted cylinder, a rock shaft forthe cylinder equipped with a spring tending to turn the rock-shaft andcause the grippers to clamp a sheet of paper against one wall of theslot of the cylinder and with a crank arm, means to turn the cylinderand then reverse its movement, means to raise the boxes and the cylinderas the reverse movement of the latter occurs, a track above the saidcrank arm to be engaged by and operate the crank arm during the reversemovement of the cylinder to effect the release of the paper by thegrippers, and a pivoted track pivotally connected to one of the boxesand underlying the said crank arm and adapted while the cylinder iselevated to be engaged by and repress the crank arm and hold itrepressed until the reverse movement of the cylinder is ended and thesecond sheet of paper is int613OS6d between the said grippers and thesaic wall of the slot.

3. A printing press, comprising a suitable frame, a printing bedthereon, a feed table above the bed, a cylinder rearward of said tableand above the bed and geared to the latter and provided with a slot, arock-shaft carried by the cylinder parallel with its axis and providedat one end with a crank and within the cylinder with grippers, yieldingmeans to cause the grippers to clamp an interposed sheet of paperprojecting rearwardly from the table, against a wall of said slot, meansto move the bed rearwardly and incidentally turn the cylinder to drawthe paper in the same direction and press it down upon the bed and thenconvey it upward and forward until. it rests on top of the cylinder, andthen reverse the movement of the bed and cylinder to move the paperrearward, means to raise the cylinder without throwing it out of gearwith the bed, a track for engagement by the crank during the earlyortion of the reverse movement of and whi e the cylinder is elevated, toreverse the rocking movement of the shaft and effect the release of thepaper by the grippers, and a second track for engagement by the crankto. effect a second movement of the grippers away from the wall of theslot before the reverse movement of the cylinder ceases.

4. A printing press, comprising a suitable frame, a printing bedthereon, a feed table above the bed, a cylinder rearward of said tableand above the bed and geared to the latter and provided with a slot, arock-shaft carried by the cylinder parallel with its axis and providedat one end with a crank and within the cylinder with grippers, a springto cause the grippers to clamp an interposed sheet of paper projectingrearwardly from the table, against a wall of said slot, means to movethe bed rearwardly and incidentally turn the cylinder to draw the paperinthe same direc- ULULL couu. kIlUDD 1U uu WJJ. UPUJJ. ULLU MUM. wuu.ULLUUJ convey it upward and forward until it rests on top of thecylinder, and then reverse the movement of the bed and cylinder to movethe paper rearward, means to raisethe cylinder without throwing it outof gear with the bed, a track for engagement by the crank during theearly portion of the reverse movement of and While the cylinder iselevated, to reverse the rocking movement of the shaft and effect therelease of the paper by the grippers, and a second track for engagementby the crank to effect a second movement of the grippers away from thewall of the slot before the reverse movement of the cylinder ceases.

5. In a printing press, a suitable frame provided with vertical slots,boxes slidable therein, a shaft suitably journaled in the boxes andequipped with a cylinder, a reciprocatory bed underlying and geared tosaid cylinder to rotate it back and forth, a rockshaft suitablyjournaled in the frame and provided With cranks at its ends, linkspivotally connecting said cranks with said oxes, a crank arm projectingfrom said rock-shaft, a reciprocatory bar having an inverted-U-shapedportion normally engaging said crank arm to rock the same back andforth, a roller overlying and normally holding said bar in operativerelation to said crank arm and arranged in such position that when thebar moves in one direction it is Withdrawn from under said roller, aspring catch to engage said crank arm when the said bar is withdrawnfrom under the roller to prevent accidental movement of said rockshaft,and a foot-lever underlying and engaging said bar between saidunderlying loner and Wm Wm saw an Wam um operated in one direction toraise the ad'- jacent end of said bar above said roller and disengage itfrom said crank arm.

6. In a printing press, a suitable frame provided with vertical slots,boxes slidable therein, a shaft suitably journaled in the boxes andecjuipped with a cylinder, a reciprocatory bec underlying and geared tosaid cylinder to rotate it back and forth, a rockshaft suitablyjournaled in the frame and provided with cranks at its ends, links pivotally connecting said cranks with said boxes, a crank arm projecting fromsaid rock-shaft, a reciprocatory bar having an inverted-U- shapedportion normally engaging said crank arm to rock the same back andforth, a roller overlying and normally holding said bar in operativerelation to said crank arm and arranged in such position that when thebar moves in one direction it is Withdrawn from under said roller, aspring catch to engage said crank arm when the said bar is withdrawnfrom under the roller to prevent accidental movement of said rock shaft,a foot-lever underlying and engaging said bar between said underlyingroller and said rock-shaft and adapted when operated in one direction toraise the adjacent end of said bar above said roller and disengage itfrom said crank arm, and means for locking said lever to hold saidreciprocatory bar in its elevated or ino erative position.

n testimony whereof I aflix my signature,

in the presence of two witnesses.

JOHN T. MILLER. Witnesses:

H. O. RODGERS, G. Y. THORPE.

